The Februrary 2005 Community Technical Preview (CTP) has been released. This CTP includes VS Pro and all of the Express SKU's (VC#, VB, VC++, VJ#, Visual Web Developer). The CTP releases have less quality assurance than betas, so for people who are more risk-averse, the Beta 1 release is a more conservative option.
We're getting closer and closer to Beta 2, and as a result the quality of interim builds like the CTP release is getting quite high. For C# developers, I recommend giving the Visual C# Express CTP a try. Installation is quick and easy, and it runs side-by-side with prior versions of VS.